CN2361660Y - Double-face dewatering and enclosed sheet forming device - Google Patents

Abstract

The utility model relates to a double-face dewatering and enclosed paper sheet forming device which belongs to a paper-making machine. The utility model is a paper sheet forming device. The utility model is composed of two round nets in opposite operation direction arranged in an enclosed round net groove, an enclosed round net groove surging element and a roll surface vacuum water absorption box. A paper sheet is formed by the dehydration of two round nets in opposite operation direction, so that all technical indexes such as the printing strength of paper surface, etc., are consistent, and the double-face proper does not exist. The large quantitative difference of a banner and the vertical and horizontal tension ratio are overcome, and the defects produced by flinging pulp and crushing can be overcome, and the consumption of a blanket and the towing power of a wet part can be decreased.

Description

Page double dewatering enclosed shaping apparatus

The utility model relates to papermaking equipment, is specially a kind of page forming device.

The sheet forming of existing fourdrinier wire and cylinder mould machine all is paper making raw materials such as employing fiber, under the liquid condition that suspends, and the moulding by the gravity single face dewatering and filtering of filter screen.In the page forming process, when beginning is filtered in filtering net surface, superfine material such as fiber fines and filler, big portion leaches with filtrate (plain boiled water), be deposited on the filtering net surface is long fiber mostly, along with the progressively thickening of filtering layer, resistance filter effect progressively strengthens, and the fiber fines and the particulate filler that are delayed in the slurry layer just progressively increase.The page that forms of single face dewatering and filtering like this, the fibre morphology on its positive and negative surface and material are formed, and tangible difference is just arranged, and therefore have a strong impact on paper quality and result of use; Particularly printing because the positive and negative surface printing intensity of paper differs 2-3 doubly, causes paper to fall hair, dry linting, the printed matter poor definition, and printing number is few, and printing ink consumes high, can not adapt to the high speed rotary press printing; Paper quantitative difference of banner and longitudinal and transverse pulling force are than big, and paper defects such as translucent point, hole and embossing often take place; Copper mesh, woollen blanket are tight on fixing suction flat box panel, the sliding friction operation, and it is high to cause copper mesh, woollen blanket to consume, and traction power is big.These problems are the long-standing technical barriers of paper machine.

The utility model is intended to develop a kind of page double dewatering enclosed type device, in order to solve above-mentioned variety of problems.

The realization the technical solution of the utility model is: comprise cylinder vat, cylinder, suction flat box, deflector roll, later roller, lower felt, polyester net, adjuster, its technical characterictic is: cylinder vat (1) is a kind of sealing cylinder vat that is provided with seal bootr (11) in (20) upper edge, slurry district of overflowing; Cylinder (2) and (3) in sealing cylinder vat (1), its axis is parallel and traffic direction is opposite; The water conservancy diversion arc (14) of sealing cylinder vat (1) advances to starch side and scalable camber plate (16) below is provided with bar-shaped horizontal surging element (15) and (17); Be located at cylinder (2) and (3) top for replacing the roll surface suction flat box (4) of couch roll; The roll surface suction flat box (5) that replaces the fixed panel suction flat box of former suction woollen blanket and page moisture; The rubbing surface of roll surface suction flat box (4) and (5) is for being contained in roll surface suction flat box (4) and (5) and the roller (25) of the rolling of woollen blanket, the synchronous operation of polyester net.

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is a page double dewatering enclosed shaping apparatus side view.

Fig. 2 is sealing cylinder vat (a 1) side sectional view.

Fig. 3 is roll surface suction flat box (a 4) cross-sectional end view.

Fig. 4 is non-suction district, roll surface suction flat box (a 4) two ends cutaway view.

Fig. 5 is non-suction district, roll surface suction flat box (a 5) two ends cutaway view.

Fig. 6 is roll surface suction flat box (a 5) cross-sectional end view.

Arrow is represented the adjusting direction of cylinder, woollen blanket, polyester network operation direction and adjuster among the figure.

One, with reference to Fig. 2, paper pulp is entered from the cylinder vat side by square Taper Pipe (26), the porous of flowing through perforaled plate (27), to starch stream divides equally on cylinder vat banner face, flow into close-network groove (1) reposefully, the guiding arc (14) of flowing through again advances to starch the bar-shaped horizontal surging element (15) and the bar-shaped horizontal surging element in scalable camber plate (16) bottom (17) of side, the effect of surging element, changed the flow direction of slurry stream, forming high surging slurry flows to shaping area (10) (water conservancy diversion arc (14) is more than the lip, to the wire side of the excessive slurry mouth of scalable camber plate, and be shaping area between the scalable camber plate (16)) filtering means dehydration formation page.Restrained the tendency that fiber is vertical arrangement, it is not big or small by 2% that the quantitative difference of banner of paper is narrowed down to by 10-15%, and longitudinal and transverse pulling force is than by 1: 2.5-4 narrows down to about 1: 1.6.

Bar-shaped horizontal surging element (15) and (17) full width are staggered, and its spacing is different with the paper kind according to paper pulp, is respectively the 20-25 millimeter.

Overflow area (20) (scalable camber plate (16) overflows more than the slurry mouthful and be overflow area between the excessive slurry ditch of the wire side of the air port of escaping (13) and camber plate (16)) upper edge is provided with seal bootr (11) and adjuster (12) thereof, regulates ease wind device (13) and wire side apart from the 5-10 millimeter.Except that ease air port (13), overflow area (20) is sealing all.Air is blasted by air inlet (21); Discharged by ease air door (13), overflow area (20) is controlled certain blast according to manufacturing technique requirent, forms the pressure starching, has suppressed the slurry layer and has gone out peeling off of critical surface, for improving formation of sheet and paper machine speed, has created good condition.

The stock inlet adjuster (18) and the slurry mouthful adjuster (19) that overflows make the flow of online paper pulp, flow velocity adapt to the manufacturing condition of producing various paper, do to regulate accordingly.

Roll surface suction flat box (4) two ends Zhi Yuyuan couch roll support arms (22) are provided with spring adjusting rod (23), and the distance of regulating between roll surface suction flat box (4) and cylinder (2) and (3) keeps good contact condition.

Two, the page that forms by cylinder (2) with reference to Fig. 1, by roll surface suction flat box (4), be adsorbed in polyester net (9),, page be sandwiched between woollen blanket (8) and the polyester net (9) through turning one's head roller (7), through roll surface suction flat box (5), the page suction is moved to lower felt (8), and carrying is between cylinder (3) top and the roll surface suction flat box (4), and the page that two cylinders form is superimposed, be sent to down operation through roller (7) later again, finish the moulding of page double dewatering.

The page of Xing Chenging like this, the slurry layer that long fiber is many cover the positive and negative surface of page, and the many slurry layers of fiber fines and filler is sandwiched in page tangent plane middle part.Eliminated the dual character of paper effectively, print surface intensity is enhanced about more than once, and other every technical indicator two sides unanimities are so paper quality and result of use are significantly improved.

Three, with reference to Fig. 3 Fig. 4, place the roll surface suction flat box (4) at two cylinder tops, by seal case (24), sealed roller (25), sealed roller bearing (26), sealing bag (27), arc sealing strip (28), sealing ring (29), suction tube (30), vacuum meter (31) is formed.2 sealed rollers (25) place in the seal box (24), and two ends place bearing (26) with bearing, and distance is about 20 millimeters between two rollers, forms wide about 70 millimeters suction district, is connected with vavuum pump with suction tube (30), is vacuum draw.Vacuum meter (31) shows vacuum.Roll surface suction flat box (4), replace couch roll, it integrates the l Water Paper page or leaf in wet end dehydration with peel off, reduce page and go out the moisture content of wire side more than 10%, when having avoided going out wire side owing to page moisture content high cause get rid of frequent paper defects such as slurry, conquassation, the translucent point of generation, hole, embossing.

Four, with reference to accompanying drawing 5 Fig. 6, roll surface suction flat box (5) places original suction flat box position, as the suction dehydration of woollen blanket, page.Its structure is except that changing camber sealing strip (28) into sealing supporting plate (32), and all the other are identical with roll surface suction flat box (4).The design has replaced the fixed panel suction flat box with the roll surface suction flat box.

The rubbing surface of suction flat box face and woollen blanket (8) polyester net (9) becomes rolling friction by sliding friction, thereby has reduced coefficient of friction 90%, can prolong felt life 50-80%, reduces felt draws power 50-70%.

As mentioned above all, the utility model can significantly improve product quality, reduces production costs, and is the optimal selection of existing paper machine technology transformation and newly-built paper machine sheet forming portion.With the two net gardens of twin-tub net paper machine is example, adopts page double dewatering enclosed shaping apparatus to undergo technological transformation, ten thousand yuan of investment RMB 6-8, and stopping production 7-10 days, the two-sided hectograph paper of production or the grade of offset paper can rise to A/B etc. by C etc.

The utility model is made up of sealing garden net groove, page double dewatering, roll surface suction flat box three parts, and each can use separately, also can all adopt at a paper machine.

Of the present utility model applying will be made outstanding contribution for China's paper industry technological progress.

Claims (1)

1. page double dewatering enclosed shaping apparatus, comprise cylinder vat, cylinder, suction box, deflector roll, later roller, lower felt, polyester webs, adjuster, its technical characterictic is: circular groove (1) is a kind of sealing cylinder vat that is provided with seal bootr (11) in overflow area (20) upper edge; Cylinder (2) and cylinder (3) in the sealing cylinder vat (1), its axis is parallel, rotation direction is opposite; The water conservancy diversion arc (14) of sealing cylinder vat (1) advances to starch side and two bar-shaped horizontal surging elements (15) and (17) are established in scalable arc (16) below; Be located at the roll surface suction flat box (4) at cylinder (2) and cylinder (3) top; The roll surface suction flat box (5) of suction woollen blanket and page moisture content; The rubbing surface of roll surface suction flat box (4) and roll surface suction flat box (5) is for being contained in the roller (25) in the vacuum dehydration casing (24).

Images